[fsp] Unmount file systems when the providing extension gets unloaded.

chrome/browser/chromeos/file_manager/volume_manager_unittest.cc

Index: chrome/browser/chromeos/file_manager/volume_manager_unittest.cc
diff --git a/chrome/browser/chromeos/file_manager/volume_manager_unittest.cc b/chrome/browser/chromeos/file_manager/volume_manager_unittest.cc
index d311301b9bb63263625d3e780ebf7bcb8fc917e8..9024c3240e3f2b005ebcc0fae0b1bcd3d11e1904 100644
--- a/chrome/browser/chromeos/file_manager/volume_manager_unittest.cc
+++ b/chrome/browser/chromeos/file_manager/volume_manager_unittest.cc
@@ -17,6 +17,7 @@
 #include "chromeos/dbus/fake_power_manager_client.h"
 #include "chromeos/disks/disk_mount_manager.h"
 #include "content/public/test/test_browser_thread_bundle.h"
+#include "extensions/browser/extension_registry.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace file_manager {
@@ -147,8 +148,10 @@ class VolumeManagerTest : public testing::Test {
     power_manager_client_.reset(new chromeos::FakePowerManagerClient);
     disk_mount_manager_.reset(new FakeDiskMountManager);
     profile_.reset(new TestingProfile);
+    extension_registry_.reset(new extensions::ExtensionRegistry);
     file_system_provider_service_.reset(
-        new chromeos::file_system_provider::Service(profile_.get()));
+        new chromeos::file_system_provider::Service(profile_.get(),
+                                                    extension_registry_.get()));
     volume_manager_.reset(
         new VolumeManager(profile_.get(),
                           NULL,  // DriveIntegrationService
@@ -161,6 +164,7 @@ class VolumeManagerTest : public testing::Test {
   scoped_ptr<chromeos::FakePowerManagerClient> power_manager_client_;
   scoped_ptr<FakeDiskMountManager> disk_mount_manager_;
   scoped_ptr<TestingProfile> profile_;
+  scoped_ptr<extensions::ExtensionRegistry> extension_registry_;
   scoped_ptr<chromeos::file_system_provider::Service>
       file_system_provider_service_;
   scoped_ptr<VolumeManager> volume_manager_;